Living in zero gravity takes a toll, even on the most conditioned bodies.
. “It will not be easy for the crew to set foot on Martian soil when they arrive–it’s very disabling,” Gauquelin-Koch noted in the same interview.
One hypothesis that the new study tested is whether astronauts can recuperate their lost bone mass by spending enough time back on Earth. Medical experts with NASA and its collaborators scanned the wrists and ankles of 17 astronauts before, during, and after they’d spent months on the International Space Station . After one year back at home, nine astronauts still hadn’t recovered the density of their shinbones.
One shred of good news is that some exercises worked better than others in helping astronauts recuperate the lost bone mass. Deadlifting rather than cycling or running seems to work better at, which suggests that heavy lower-body exercises would be beneficial in preparing for long space missions. Astronauts who were fit and in their 40s also did not seem impacted as much by the bone loss. “Fatigue, light-headedness, and imbalance were immediate challenges for me on my return. Bones and muscles take the longest to recover following spaceflight.” said Robert Thirsk, a former chancellor at The University of Calgary and a former Canadian Space Agency astronaut in a
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